45. “From Clifford through Cartan to Kaehler”,Hypercomplex numbers in geometry and physics, #1 (13) Tom 7, pp. 165-180, 2010 (Moscow). The issue where the paper can be found is http://hypercomplex.xpsweb.com/page.php?lang=ru&id=569 Click on: Russian pdf. Scroll down to P. 165. All papers are in Russian except Vargas.

40. “Recent Developments on the Foundations of Classical Differential Geometry with Implications for the Testing and Understanding of Flat Spacetime Physics”, Proceedings of XIII International Scientific Meeting on Physical Interpretations of Relativity Theory, Baumann State Technical University, Moscow, 2007.